Results 41 to 50 of about 34,517 (164)
Roulettes: a weak lensing formalism for strong lensing: I. Overview [PDF]
, 2016 We present a new perspective on gravitational lensing. We describe a new extension of the weak lensing formalism capable of describing strongly lensed images.
C. Clarkson
semanticscholar +1 more source
Precision Weak Gravitational Lensing Using Velocity Fields: Fisher Matrix Analysis [PDF]
Astrophysical Journal, 2019 Weak gravitational lensing measurements based on photometry are limited by shape noise: the variance in the unknown unlensed orientations of the source galaxies.
D. Wittman, M. Self
semanticscholar +1 more source
Testing General Relativity with Current Cosmological Data [PDF]
, 2010 Deviations from general relativity, such as could be responsible for the cosmic acceleration, would influence the growth of large scale structure and the deflection of light by that structure.
Alexie Leauthaud +8 more
core +2 more sources
Influence of the local Universe on weak gravitational lensing surveys [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Observations of the large-scale structure (LSS) implicitly assume an ideal Friedmann-Lemaitre-Robertson-Walker (FLRW) observer with the ambient structure having no influence on the observer.
R. Reischke +4 more
semanticscholar +1 more source
Shadows and photon spheres in static and rotating traversable wormholes
Nuclear Physics BWe explore the shadows and photon orbits of both static and rotating traversable wormholes by employing a redshift function in combination with two distinct shape functions.
Takol Tangphati +3 more
doaj +1 more source
, 2017 Based on the standard gravitational lensing formalism with its effective, projected lensing potential in a given background cosmology, we investigate under which transformations of the source position and of the deflection angle the observable properties
Wagner, Jenny
core +2 more sources
Gravitational Effects on the Neutrino Oscillation [PDF]
, 1996 The propagation of neutrinos in a gravitational field is studied. A method of calculating a covariant quantum-mechanical phase in a curved space-time is presented.
Bilenky +9 more
core +5 more sources
Image simulations for gravitational lensing withskylens [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We present the latest version of the ray-tracing simulation code SKYLENS, which can be used to develop image simulations that reproduce strong lensing observations by any mass distribution with a high level of realism.
A. Plazas +5 more
semanticscholar +1 more source
Describing variations of the Fisher-matrix across parameter space
, 2016 Forecasts in cosmology, both with Monte-Carlo Markov-chain methods and with the Fisher matrix formalism, depend on the choice of the fiducial model because both the signal strength of any observable as well as the model nonlinearities linking observables
Reischke, Robert, Schäfer, Björn Malte
core +1 more source
GRAVITATIONAL LENSING EFFECT ON COSMIC MICROWAVE BACKGROUND ANISOTROPIES: A POWER SPECTRUM APPROACH [PDF]
, 1995 The effect of gravitational lensing on cosmic microwave background (CMB) anisotropies is investigated using the power spectrum approach. The lensing effect can be calculated in any cosmological model by specifying the evolution of gravitational potential.
Seljak, Uros
core +2 more sources